A recent case study by Darya Belaya on dev.to highlights the importance of looking beyond green CI results. The author shares an experience where a TypeScript migration doubled test runs with zero failures, yet the system still had issues. This example illustrates that green CI results do not necessarily mean the system works as expected.

CI Limitations

The article explains that a green CI result only indicates that the tests have passed, but it does not guarantee the system's overall functionality. This is because tests may not cover all scenarios, or they may be flawed. As noted in the article, even with a green CI result, the system can still have problems.

Test Coverage and Quality

The case study emphasizes the need for thorough test coverage and high-quality tests. Simply having a large number of tests is not enough; they must be well-designed and comprehensive. The author's experience with TypeScript migration and Playwright tests demonstrates the importance of careful test planning and execution.

What this means for QA engineers

As QA engineers, it is crucial to remember that green CI results are just one aspect of the testing process. We must also consider test coverage, test quality, and overall system functionality. By doing so, we can ensure that our systems work as expected, even if the CI results are green. The original article by Darya Belaya on dev.to provides valuable insights into the limitations of green CI results and the importance of thorough testing.